Aria/frontend/src/app/chat/Markdown.tsx at 3d5d9d11aaa42dd750bf0ca239956a9d3500bbf9 · zestones/Aria · GitHub

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import type { ComponentPropsWithoutRef } from "react";
import ReactMarkdown, { type Components } from "react-markdown";
import remarkGfm from "remark-gfm";

const ANCHOR_CLASS =
    "underline underline-offset-2 text-[var(--ds-accent)] hover:text-[var(--ds-accent-hover)] transition-colors duration-[var(--ds-motion-fast)]";

const CODE_INLINE_CLASS =
    "font-mono bg-[var(--ds-bg-elevated)] text-[var(--ds-fg-primary)] px-1.5 py-0.5 rounded-[var(--ds-radius-sm)] text-[var(--ds-text-xs)] border border-[var(--ds-border)]";

const CODE_BLOCK_CLASS =
    "font-mono bg-[var(--ds-bg-elevated)] text-[var(--ds-fg-primary)] p-3 rounded-[var(--ds-radius-md)] overflow-x-auto text-[var(--ds-text-xs)] leading-relaxed border border-[var(--ds-border)]";

type CodeProps = ComponentPropsWithoutRef<"code"> & { inline?: boolean };

const components: Components = {
    p: ({ children, ...rest }) => (
        <p
            {...rest}
            className="mb-2 last:mb-0 leading-[1.55] text-[var(--ds-text-sm)] text-[var(--ds-fg-primary)]"
        >
            {children}
        </p>
    ),
    a: ({ children, href, ...rest }) => (
        <a {...rest} href={href} target="_blank" rel="noreferrer noopener" className={ANCHOR_CLASS}>
            {children}
        </a>
    ),
    strong: ({ children, ...rest }) => (
        <strong {...rest} className="font-semibold text-[var(--ds-fg-primary)]">
            {children}
        </strong>
    ),
    em: ({ children, ...rest }) => (
        <em {...rest} className="italic text-[var(--ds-fg-primary)]">
            {children}
        </em>
    ),
    ul: ({ children, ...rest }) => (
        <ul
            {...rest}
            className="mb-2 last:mb-0 ml-4 list-disc space-y-1 text-[var(--ds-text-sm)] marker:text-[var(--ds-fg-subtle)]"
        >
            {children}
        </ul>
    ),
    ol: ({ children, ...rest }) => (
        <ol
            {...rest}
            className="mb-2 last:mb-0 ml-5 list-decimal space-y-1 text-[var(--ds-text-sm)] marker:text-[var(--ds-fg-subtle)]"
        >
            {children}
        </ol>
    ),
    li: ({ children, ...rest }) => (
        <li {...rest} className="leading-[1.55] text-[var(--ds-fg-primary)]">
            {children}
        </li>
    ),
    h1: ({ children, ...rest }) => (
        <h1
            {...rest}
            className="mb-2 mt-3 first:mt-0 text-[var(--ds-text-lg)] font-semibold tracking-[-0.01em] text-[var(--ds-fg-primary)]"
        >
            {children}
        </h1>
    ),
    h2: ({ children, ...rest }) => (
        <h2
            {...rest}
            className="mb-2 mt-3 first:mt-0 text-[var(--ds-text-md)] font-semibold tracking-[-0.01em] text-[var(--ds-fg-primary)]"
        >
            {children}
        </h2>
    ),
    h3: ({ children, ...rest }) => (
        <h3
            {...rest}
            className="mb-1.5 mt-2 first:mt-0 text-[var(--ds-text-sm)] font-semibold text-[var(--ds-fg-primary)]"
        >
            {children}
        </h3>
    ),
    blockquote: ({ children, ...rest }) => (
        <blockquote
            {...rest}
            className="mb-2 last:mb-0 border-l-2 border-[var(--ds-border-strong)] pl-3 text-[var(--ds-fg-muted)] italic"
        >
            {children}
        </blockquote>
    ),
    hr: () => <hr className="my-3 border-t border-[var(--ds-border)]" />,
    table: ({ children, ...rest }) => (
        <div className="mb-2 last:mb-0 overflow-x-auto rounded-[var(--ds-radius-sm)] border border-[var(--ds-border)]">
            <table
                {...rest}
                className="w-full border-collapse text-[var(--ds-text-xs)] text-[var(--ds-fg-primary)]"
            >
                {children}
            </table>
        </div>
    ),
    thead: ({ children, ...rest }) => (
        <thead {...rest} className="bg-[var(--ds-bg-elevated)] text-left">
            {children}
        </thead>
    ),
    th: ({ children, ...rest }) => (
        <th
            {...rest}
            className="border-b border-[var(--ds-border)] px-2.5 py-1.5 font-medium text-[var(--ds-fg-muted)]"
        >
            {children}
        </th>
    ),
    td: ({ children, ...rest }) => (
        <td
            {...rest}
            className="border-b border-[var(--ds-border)] px-2.5 py-1.5 align-top last:border-b-0"
        >
            {children}
        </td>
    ),
    pre: ({ children, ...rest }) => (
        <pre {...rest} className={`mb-2 last:mb-0 ${CODE_BLOCK_CLASS}`}>
            {children}
        </pre>
    ),
    code: (props: CodeProps) => {
        const { inline, className = "", children, ...rest } = props;
        if (inline) {
            return (
                <code {...rest} className={`${CODE_INLINE_CLASS} ${className}`}>
                    {children}
                </code>
            );
        }
        return (
            <code {...rest} className={className}>
                {children}
            </code>
        );
    },
};

export interface MarkdownProps {
    children: string;
}

export function Markdown({ children }: MarkdownProps) {
    return (
        <ReactMarkdown remarkPlugins={[remarkGfm]} components={components}>
            {children}
        </ReactMarkdown>
    );
}